scholarly journals Upland Rice Breeding in Uganda: Initiatives and Progress

10.5772/66826 ◽  
2017 ◽  
Author(s):  
Jimmy Lamo ◽  
Pangirayi Tongoona ◽  
Moussa Sie ◽  
Mande Semon ◽  
Geoffrey Onaga ◽  
...  
Keyword(s):  
Upland Rice ◽  
Rice Breeding

scholarly journals Diversity and Potential of Oryza glaberrima Steud in Upland Rice Breeding.

1997 ◽  
Vol 47 (4) ◽  
pp. 395-398 ◽  
Author(s):  
P.Monty Jones ◽  
Semon Mande ◽  
Kayode Aluko
Keyword(s):  
Upland Rice ◽  
Oryza Glaberrima ◽  
Rice Breeding

scholarly journals Research Article Marker-Assisted elimination of drought-susceptible accessions in upland rice breeding

2018 ◽  
Vol 17 (1) ◽  
Author(s):  
Ariadna Faria Vieira ◽  
Gabriel Feresin Pantalião ◽  
Fernanda Martins Abreu ◽  
Ricardo Dias Silveira ◽  
Ana Letycia Ba Garcia ◽  
...  
Keyword(s):  
Upland Rice ◽  
Rice Breeding ◽  
Research Article

Effectiveness of early-generation testing applied to upland rice breeding

Euphytica ◽  
2018 ◽  
Vol 214 (4) ◽  
Author(s):  
Matheus S. Barros ◽  
Odilon P. Morais Júnior ◽  
Patrícia G. S. Melo ◽  
Orlando P. Morais ◽  
Adriano P. Castro ◽  
...  
Keyword(s):  
Upland Rice ◽  
Rice Breeding ◽  
Early Generation ◽  
Early Generation Testing

Results of 25 Years of Upland Rice Breeding in Brazil

Crop Science ◽  
2011 ◽  
Vol 51 (3) ◽  
pp. 914-923 ◽  
Author(s):  
Flavio Breseghello ◽  
Orlando Peixoto de Morais ◽  
Patrícia Valle Pinheiro ◽  
Ana Carolina Simões Silva ◽  
Emilio da Maia de Castro ◽  
...  
Keyword(s):  
Upland Rice ◽  
Rice Breeding

scholarly journals Performance of upland rice strains in reaction to fungal diseases

2021 ◽  
pp. 24-31
Author(s):  
Natália Botega Alves ◽  
Douglas Goulart Castro ◽  
Marco Renan Félix ◽  
Laís Moretti Tomé ◽  
Antônio Rosário Neto ◽  
...  
Keyword(s):  
Agricultural Research ◽  
Upland Rice ◽  
Block Design ◽  
Minas Gerais ◽  
Fungal Diseases ◽  
Breeding Program ◽  
Brown Spot ◽  
Rice Breeding ◽  
Significant Difference ◽  
The Impact

The control of the impact of diseases on plants can be carried out via breeding, through the development of cultivars less susceptible to pathogens. Therefore, this study aimed to assess the severity of fungal diseases in upland rice strains from the Cultivation and Use Value test, belonging to the Upland Rice Breeding Program” of Federal University of Lavras (UFLA), in partnership with “EMBRAPA Rice and Beans” and the “Minas Gerais Agricultural Research Company” (EPAMIG). The experiment was installed in the municipalities of Lambari and Lavras, both in Minas Gerais, Brasil, in the 2015/2016 and 2016/2017 seasons, in a randomized block design with three replications. Were evaluated 14 lines, 11 lines of the program and 3 commercial witnesses, regarding the intensity of diseases (leaf and neck blast, brown spot, grain spot and scalding). There was a significant difference between lineages for all traits, except brown spot, indicating the presence of genetic variability for the characters in question. The study of the interaction was performed, decomposing the statistically significant ones in simple and complex interactions. The experiment presented a coefficient of variation from 29% to 56% and accuracy from 56% to 95.5%, indicating that the estimates were obtained with good to medium experimental precision. It is essential to evaluate diseases in breeding programs in order to select cultivars that are increasingly resistant, as these affect not only productivity, but the quality and final yield of grains. The genotypes CMG 2119 (5), CMG 2162 (1), CMG 1896 (13) and CMG 2168 (2) were shown to be more tolerant to all diseases simultaneously, being, therefore, the most suitable for the launch, considering the character disease resistance. The Upland Rice Breeding Program of UFLA has lines with variability for resistance, strains with potential for release.

Genetic progress in upland rice breeding program for grain yield and plant height

2021 ◽  
Vol 45 ◽  
Author(s):  
Amanda Mendes de Moura ◽  
Flávia Barbosa Silva Botelho ◽  
Laís Moretti Tomé ◽  
Cinthia Souza Rodrigues ◽  
Camila Soares Cardoso da Silva ◽  
...  
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Mixed Model ◽  
Upland Rice ◽  
Breeding Program ◽  
High Yield ◽  
Joint Analysis ◽  
Rice Breeding ◽  
Genetic Progress ◽  
Mixed Model Approach

ABSTRACT In the context of plant breeding programs, it is necessary to evaluate the efficiency of genotype selection over successive years. However, evaluating the genotype selection efficiency is not an easy task, since there is not just a single way to precede it. Besides that, the programs need to be dynamic; that is, they should be able to track the introduction and discard of genotypes each year. As a result, the available data is quite unbalanced, leading to difficulties in certain analyses. Thus, the present study aims to propose some approaches to verify the genetic progress in the preliminary trial of the Federal University of Lavras (UFLA) upland rice breeding program. We utilized mixed models for grain yield and plant height. Trials were performed with a total of 120 genotypes in seven environments, defined by the interaction between locations and years. Due to the imbalance in the available data, the mixed model approach, i.e., Restricted Maximum Likelihood/Best Linear Unbiased Prediction (REML/BLUP), was adopted for the joint analysis. Besides the genetic and phenotypic parameters, the expected gains were also obtained with the selection, genetic progress, renewal rate (RR%), and dynamism of preliminary trials. The efficiency of the selection of superior genotypes per year was verified, with genetic progress favorable for reducing the medium-sized plants associated with high yield.

scholarly journals Upland rice breeding in Brazil: a simultaneous genotypic evaluation of stability, adaptability and grain yield

Euphytica ◽  
2013 ◽  
Vol 192 (1) ◽  
pp. 117-129 ◽  
Author(s):  
José Manoel Colombari Filho ◽  
Marcos Deon Vilela de Resende ◽  
Orlando Peixoto de Morais ◽  
Adriano Pereira de Castro ◽  
Élcio Perpétuo Guimarães ◽  
...  
Keyword(s):  
Grain Yield ◽  
Upland Rice ◽  
Rice Breeding

scholarly journals Comparative Slow-Blasting in Rice Grown Under Upland and Flooded Blast Nursery Culture

Plant Disease ◽  
1999 ◽  
Vol 83 (7) ◽  
pp. 681-684 ◽  
Author(s):  
X. H. Lai ◽  
M. A. Marchetti ◽  
H. D. Petersen
Keyword(s):  
Upland Rice ◽  
Blast Resistance ◽  
Differential Susceptibility ◽  
Blast Disease ◽  
Disease Development ◽  
Rice Breeding ◽  
Leaf Blast ◽  
Nursery Culture ◽  
Flooded Rice ◽  
Highly Correlated

Evaluation of rice for resistance to rice blast disease caused by Pyricularia grisea usually is conducted in upland (nonflooded) disease nurseries, although all commercial U.S. rice is produced under flood irrigation. Upland rice is more susceptible to leaf blast than is flooded rice, and the magnitude of this differential susceptibility can vary among cultivars. This 2-year study was undertaken to determine (i) the relationship between rates of disease development (slow-blasting) in upland and flooded rice and (ii) the value to a rice breeding program of establishing a flooded blast nursery, a facility far more difficult to manage than an upland nursery. Among 200 rice lines compared for leaf blast susceptibility under upland and flooded cultures, only 7 were rated as slightly more resistant under upland culture and 136 rated more resistant under flooded culture. Disease ratings under upland and flooded cultures were highly correlated (R = 0.819). Among 14 preselected cultivars over 2 years, disease development curves under upland and flooded cultures were highly correlated (R = 0.990). The cultivars with intermediate susceptibility under upland culture appeared to benefit most from flooded culture. Upland culture provided more opportunities to assess slow-blasting than did flooded culture, since many lines that produced susceptible-type lesions in upland culture failed to do so under flooded culture. It was concluded that adequate information on comparative leaf blast resistance among rice lines was attainable from upland blast nurseries and that routine evaluation of rice breeding lines for blast resistance in flooded nurseries was not necessary.

scholarly journals Estimation of Drought Tolerance Based on Leaf Temperature in Upland Rice Breeding

2006 ◽  
Vol 56 (1) ◽  
pp. 47-54 ◽  
Author(s):  
Masakata Hirayama ◽  
Yoshiharu Wada ◽  
Hiroshi Nemoto
Keyword(s):  
Drought Tolerance ◽  
Upland Rice ◽  
Leaf Temperature ◽  
Rice Breeding

scholarly journals KAJIAN VARIABILITAS GALUR-GALUR PADI GOGO PADA LAHAN KERING MASAM

2020 ◽  
Vol 22 (2) ◽  
pp. 114-118
Author(s):  
Angelita P L ◽  
Rini Hermanasari ◽  
Yullianida Yullianida ◽  
Aris Hairmansis
Keyword(s):  
Genetic Variability ◽  
Selection Criteria ◽  
Upland Rice ◽  
Acid Soil ◽  
Rice Breeding ◽  
Genetic Advance ◽  
Experimental Station ◽  
High Heritability ◽  
Augmented Design ◽  
Productive Tiller

[VARIABILITY STUDIES OF UPLAND RICE LINES ON AN ACIDIC SOIL]. Suscessful upland rice breeding program to produce productive and adaptive to acid soil is dependent upon the extent of genetic variability of the breeding materials. Objectives of this study were to estimate the genetic variability, phenotypic and genotypic coeficient of variations, heritability, genetic advance, and correlation of five traits observed from dari 298 upland rice lines and five checks varieties. A field field experiment arranged in an augmented design was conducted at the Tamanbogo Experimental Station in Lampung 1 MT 2019.. The results of the analysis of variance showed that there was diversity among lines, resulting in differences in appearance on plant height, number of productive tillers, and yields. High heritability, genetic advancement, and high correlation on the number of productive tiller indicate that this character is a selection criteria so that selection can be done in an effort to improve these characters

Sign in / Sign up

Export Citation Format

Share Document